Pipeline monitoring based on ultrasonic guided acoustic wave and fiber optic sensor fusion

Nageswara Lalam; Ruishu F. Wright; Paul R. Ohodnicki

doi:10.1117/12.2619042

27 May 2022 Pipeline monitoring based on ultrasonic guided acoustic wave and fiber optic sensor fusion

Nageswara Lalam, Ruishu F. Wright, Paul R. Ohodnicki

Author Affiliations +

Proceedings Volume 12105, Fiber Optic Sensors and Applications XVIII; 1210509 (2022) https://doi.org/10.1117/12.2619042
Event: SPIE Defense + Commercial Sensing, 2022, Orlando, Florida, United States

Abstract

In this paper, we demonstrated a fiber acoustic sensor based on a single-mode–multimode–single-mode (SMS) fiber structure. The SMS fiber structure consists of a multimode fiber (MMF) sandwiched between two single-mode fibers (SMFs). Whenever the MMF fiber experiences vibration disturbances, the fiber experiences tensile and compressive strains. By demodulating the vibration-induced intensity fluctuations, the vibrations signals can be quantified. Through employing several SMS sensors in parallel and connecting, and controlling by an optical switch, quasi-distributed sensing can be realized. The proposed sensor system is demonstrated in a laboratory environment and has the capability of detecting a wide range of vibration frequencies from 10 Hz to 400 kHz. In addition, the fiber sensor system is field-tested, where several SMS fiber sensors are mounted on 8.5” diameter steel pipe and excite acoustic emissions based on a magnetostrictive guided wave collar system. The proposed highly sensitive fiber sensor can be potentially used in practical applications of pipeline health condition monitoring.

Conference Presentation

Citation Download Citation

Nageswara Lalam, Ruishu F. Wright, and Paul R. Ohodnicki "Pipeline monitoring based on ultrasonic guided acoustic wave and fiber optic sensor fusion", Proc. SPIE 12105, Fiber Optic Sensors and Applications XVIII, 1210509 (27 May 2022); https://doi.org/10.1117/12.2619042

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